I use Subversion command line client. But I also have Tortoise SVN installed, because some operations like log and check-in benefit from the GUI.

Tortoise SVN is a Explorer shell extension which calls a Windows executable, TortoiseProc.exe.

To use it from the command line, simply save this batch file somewhere in your path :

@echo off 
start "" "C:\Program Files\TortoiseSVN\bin\TortoiseProc.exe" /command:%1 /path:"%2"

Then simply call like this :

tortoise log http://src.pararlint.com/aucun/trunk

or like this

tortoise commit .

Tested on Windows with 32 and 64 bits version.